/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.data.quality.utils;

import org.apache.dolphinscheduler.data.quality.config.Config;

import java.util.LinkedHashMap;
import java.util.Map;

public class ConfigUtils {

  private ConfigUtils() {
    throw new IllegalStateException("Construct ConfigUtils");
  }

  /**
   * Extract sub config with fixed prefix
   *
   * @param source     config source
   * @param prefix     config prefix
   * @param keepPrefix true if keep prefix
   */
  public static Config extractSubConfig(Config source, String prefix, boolean keepPrefix) {
    Map<String, Object> values = new LinkedHashMap<>();

    for (Map.Entry<String, Object> entry : source.entrySet()) {
      final String key = entry.getKey();
      final String value = String.valueOf(entry.getValue());

      if (key.startsWith(prefix)) {
        if (keepPrefix) {
          values.put(key, value);
        } else {
          values.put(key.substring(prefix.length()), value);
        }
      }
    }

    return new Config(values);
  }
}
